their child away, having disembarked from the black helicopter t say total fabrication and to do it as bob dole sat there on the senate floor asking for their support is a travesty. >> woodruff: gentlemen, thank you both. mark shields, david brooks. and mark and david will keep up the talk on the doubleheader recorded in our newsroom and that will be posted at the top of the rundown later tonight. >> brown: finally tonight, doling out history lessons on twitter. gwen ifill has that. >> ifill: newshour regular michael beschloss has written eight books and count its commentaries on the american presidenciment but recently he's discovered a new way to engage a different audience. taking us back to the nation's contemporary history in 140 characters or less. michael joins us now. michael, what is with the 140 character chunks, when did you start dolling out history this way. >> it is an antidote to the wrong looks i write. it was actually during one of the debates right here in the studio we were watching, as you remember. and christina arc, countries tina saw me looking at a search engine wit